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the more electronegative element in a binary compound is assigned the number equal to the charge it would have...
if it were an ion
oxygen has an oxidation number of negative two unless it is combined with F, when it is...or it is in a peroxide, when it is...
plus two, negative one
the oxidation of hydrogen in most of its compounds is plus one unless it combined with a metal in which case it is...
in compounds, the element of groups 1 and 2 as well as aluminum have oxidation number of...
plus one, plus two, and plus three respectively
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